I would like to suggest using Expo instead of standard React. Expo supports generating web, IOS and Android apps off from a single source code now. That is an extremely useful feature.
I am using Expo currently in my own app without any significant issues. The biggest difference is that you have to use React Native everywhere, not plain React.
Don't worry about the run-time size. When you are ready for production - eject the app and get rid of it.
I would like to suggest using Expo instead of standard React. Expo supports generating web, IOS and Android apps off from a single source code now. That is an extremely useful feature.
I am using Expo currently in my own app without any significant issues. The biggest difference is that you have to use React Native everywhere, not plain React.
Don't worry about the run-time size. When you are ready for production - eject the app and get rid of it.